Internal-combustion-engine valve



Feb. 5, 1929. 1,700,862

R. J. THOMPSON INTERNAL COMBUSTION ENGINE VALVE Filed 00t- 1925 2 Sheets-Sheet 1 I l E E6 11 2 I7 is 20 l5 'l 0 l 1/ I0 I J a wuenddz 9 WW Feb. 5, 1929. 1,700,862

- R. J. THOMPSON INTERNAL COMBUSTION ENGINE VALVE Filed Oct- 1925 2 Sheets- Sheet 2 Patented Feb. 5, 1929 tJhllTE STTES ROBERT J. THOMPSON, OF HARRISBURG, PENNSYLVANIA.

INTERNAL-COMBUSTIONENGINE VALVE.

Application filed October 6, 1925. Serial No. 60,902.

The present invenli-in; relates to rotary valve me hanisins for internal con'lbustion eng nes.v the object belo to provide a structurn that is practical and has relatively little friction surface, and is one that is easily construcicd and readily repaired.

In the accompanying drawings: l igure l a vertical sectional through an engine illustrating the mechanism in elevation,

Figure 2 i a cros 5e tional view taken on the line of Figure 1.

Figure 3 is a d tail sectional view on an enlarged scale through the valve,

Figure -1 is a detail pm'spcctivc view of of the filling blocks,

Figure is a simi ar View of one of the packing rings,

Figure 6 a detail pcrspectivc view of the shaft,

llig 'ure T a detail 1')erspectivc view of one of te packing keys,

Figure 8 is a perspective view of a l1l0tl fied form of rings.

in thc cnihidizuent disclosed. an engine lll'fitli is :hown, comprisilnr a zylinder member fl containing? a plurali of piston chainl View valve it), Itlountcd to recipro .e in these handi rs arc pistons ll. l t wzll be underfi' -al that this structur may he of any w ll lii i tl or desir d type.

in the cvlindcr member tixcd a head 1;, r/hich i s l dillt'l a vale chamlior lil e:-;- nd ii g' over and common to a l the i This valve chamber :8

die various piston chantilll ml in tlzc aimplants .'i"l1thop if, and ii In ic lm'cs rs are iiilcii ictac a'i lil'c? binds l9 that till the rcccsses and have their: outcr sin-laces curved to onorm to the urvature of the shaft. Each of m the liloc is provided with a pocket or passageway 9t). Surroundnu; the shaft and covering the blocks 19 are packing rings 21, pnct'erahly of spring material and split as shown at 'lhesc rings are each secured one and, and its indicated at 23, to its liloclt,

the other end being free. The cut or split portion is bridged by a packing key 24, preferably fitted into recesses formed in the ends of the ring, the key having enlarged heads :26 projecting beyond the ring. The rings furthermore have in their end portions ports 27 that are in communication with the pofkets 20 of the blocks, and these ports 27 are so disposed that they move into and out of register with the ports 14, 15 and 16 of the piston chambers, so as to alternately aflord wininunication through the pockets 20 between the ports 1's, and 15, and between the ports ll and 16 as the shaft rotates.

With this construction therefore, it will be evident that as the shaft 17 is rotated in syn- (hronism with the movements of the pistons, the supply ports 15 will be brought into comin unication with the ports 14 and supplies of fuel thus enter the piston chambers 10. After. the explosions take place, the ports 14 it ill be brought into communication with the exhaust ports 16 and allow the escape of the exhaust cases.

In this construction, a practical rotary alve is provided, in which a relatively small amount of friction surface is necessary, and this is divided up so that it is at the points where proper resistance is secured to the orce of the exploding charges. The parts are easily manufactured, they are duplicated and may be rearranged and adjusted or rcs pla ed as desired.

Moreover the rings will tit the valve cha nhcr walls even though the shaft is not ontiret true and accurate and the hlocl: 19 will accommodate itself to any reasonable (,llElIlilG in the ring. It furthermore acts as an anfor the ring, and being: tightly titted mto. provides an oil-proof joint. h lorec cr in addition to the fact that any hlock ca? readily b replac d. these hlocks can be individually more casily sha 'ied than would lie the drilling; and milling: of the shaft itself.

in Figure 8 a, slightly modified harm of construction is illustrated. in which the ring: 2t is substantially the samc as the ripe 21. al ill dcscr l ed. except that no packing key, as 24. is employed. but the ring: is split diagonally, as shown at 22*; otherwise its strum ture and operation is the same as that already described.

From the foregoing, it is thought that the construction, operation and many advantara es of the herein described invention will he apparent to those skilled in the art, without turther description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

\Vhat I claim, is:

1. A rotary valve for internal combustion engines, including a rotary carrier shaft having a recessed seat, and a block fitted into said seat and having a fluid passageway.

2. A rotary valve for internal combustion engines, including;- a rotary carrier shatt havinga recessed seat. a block fitted into said seat and having a fluid passageway, and a ring surrounding the block and shaft.

3. A rotary valve tor internal combustion engines, including a rotary carrier shaft havin; a recessed seat, a bloel; fitted into said seat and having a fluid passageway. and a ring surrounding the block and shaft and having ports communicating; wi h the passageway to permit the passage of tiuid therethroiurh.

4. A rotary valve for internal cou'ihnstion engines, including a rotary carrier shaft having a recessed seat, a block titted into said seat and having a fluid passageway, and a splitspring ring surrounding the bloc I and shaft and having; ports in its ends comu'iuiiieating with the passageway to permit the passage 0t fluid thercthrougp h.

A rotary valve for internal combu tion engines, including a rotary carrier shatt having a recessed seat, a block fitted into said seat and having fluid passageway, and a split spring ring surrounding the block and shaft and having its cut or split over the block, and a packing bridge key between said end, said ends having ports in its ends conimunicating with the passageway to permit the passage of fluid therethrough.

(5. A rotary valve for internal combustion engines, including a rotary shaft, a split spring ring surrounding the shaft and rotatable therewith, said ring having ports in its ends on opposite sides of the split for the passage of fluid, a passageway within the ring connecting the ports and a packing key fitted between the ends ot the ring and between the ports. 7

7. In an internal combustion engine, the 'oinbination with a cylinder member having a plurality ot piston chambers and pistons therein, of a valve chamber common to the piston chambers and having ports in communication therewith, a rotary shat't in the valve chamber having pockets aliued with t e ports, blocks in said pockets having uas a reways. and a plurality of split rings sin-roundino he shaft and blocks and ha viug ports that move into and out of communi at on with the piston ehaniher ports. said valve chaniher also having intake and exhaust ports with which the ring: ports communicate.

9. A rotary valve for internal eombustio i engines, including a, rotary carrier shaft having a recessed seat, a block fitted into said seat, and a split ring Sili'YOlUltllrli? the shattaud block and secured to said block.

9, ,i notary valve for internal combustion line. including" a rotary carrier sh" t't ha ving; a recessed seat, a block titted into i l seat and a split surrounding the slza tt and block and secured to said block, said hlocl: having: a passageway and said ring having ports in communication with the passageway.

In testimony whereof, I atiiv my signature.

ROBERT J. THOMPSON. 

